Poplar Grove School opened in 1927 as a four-classroom school for African American students in Union Co. An extra classroom was added in 1941. In the mid-1960s the original four classrooms were removed and the remaining large classroom was converted into a private residence. As of 2018, the remaining portion of the building was the last Rosenwald-era African American school in Union Co. Local tradition holds that it was a Rosenwald School, and it offered educational opportunity to African American students at a time when S.C. schools were racially segregated. Among the rural African American schools in Union Co., it produced the largest number of college graduates.